<layout-header></layout-header>

<nav class="container-xl mb-3">
    <ol class="breadcrumb">
        <li class="breadcrumb-item"><a routerLink="/welcome">首页</a></li>
        <li class="breadcrumb-item active">错误信息</li>
    </ol>
</nav>

<div class="container-xl mb-3">
    <div class="alert alert-danger" role="alert">
        404 Not Found
    </div>
</div>